166687055 has 8 divisors (see below), whose sum is σ = 202842144. Its totient is φ = 131471200.

The previous prime is 166687021. The next prime is 166687069. The reversal of 166687055 is 550786661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 166687055 - 2⁸ = 166686799 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166686997 and 166687015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234416 + ... + 235125.

It is an arithmetic number, because the mean of its divisors is an integer number (25355268).

Almost surely, 2^166687055 is an apocalyptic number.

166687055 is a deficient number, since it is larger than the sum of its proper divisors (36155089).

166687055 is an equidigital number, since it uses as much as digits as its factorization.

166687055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469617.

The product of its (nonzero) digits is 302400, while the sum is 44.

The square root of 166687055 is about 12910.7340999650. The cubic root of 166687055 is about 550.3436474986.

The spelling of 166687055 in words is "one hundred sixty-six million, six hundred eighty-seven thousand, fifty-five".